Perpetual calendar.



S. L. BERRY.

PERPETUAL GALENDAR.

APPLIoATIoN PILBD'JUNE 2s, 1909.

Patented Nov.8, 1910.

THE Ncmus Parmis co., WASHINGTON. 1 7. c.

UNITED srars N PERPET'UAL CALENDAR.

Specification of Letters Patent.

Patented Nov. 8, 1910.

Application filed June 28, 1909. Serial No. 504,721.

To all whom 'it may concern:

Be it known that I, SILAS L. BERRY, a citizenof the United States,residing at Redlands, county of San Bernardino, State of California,have invented new and useful Improvements in Perpetual Calendars, ofwhich the following is a specification.

My invention relates to a perpetual calendar formed of a stationary partcontaining certain tabulated information, and a revolvn ing partcontaining coacting tabulated information, by means of which the day ofthe week of any date, either past, present or future, to the 44thcentury may be quickly found. I accomplish this object by the calendardescribed herein and illustrated in the accompanying drawings, in which;

Figure l is the front elevation of my improved calendar. Fig. 2 is anend elevation of Fig. l.

In carrying out my invention I provide a back or base A which ispreferably of white card board which may be of any suitable size. In thecenter of this board I mount a circular disk B also preferably of whitecard board, which may be of any suitable size. For the purpose ofdescribing my invention this circular disk of card board will be fiveand one half inches in diameter. The outer circumference of this disk isdivided into 28 equal parts, by placing points equi-distant around thecircumference. From these points I draw radial lines C which preferablyeXtend a half inch toward the center of the disk and terminate at thecircular line D, and in the spaces thus formed I print the names of thedays of the week, the same being shown abbreviated in the drawings, andthey are so arranged as to read regularly from right to left. One halfofthe radial lines C are further continued toward the center and formsub-radial lines E which terminate at the semi-circular line F. In thespaces thus formed I print the names of the days of the week, soarranged as to read regularly from left to right.

When the central disk is in the central position shown in the drawings Idraw 8 straight lines parallel with the diameter of the disk as shown,which diameter I term the vertical diameter. These lines are drawn fromthe points where the right hand 8 radial lines E intersect thesemicircle F, and are marked lines G. In the right hand space or columnformed by these lines, at the top thereof are the letters N. S., whichare an abbreviation of the words New style of reckoning, and in thisspace at the top thereof is the numeral 1, and below are the centurieswhich are divisible by 400 up to 4400, which constitute the true leapyears. Below the numerals 4400 are the abbreviations Sat. for Saturdaywhich occurs twice, and at the right thereof and pointing to saidabbreviations are arrows, and vto the right of said arrows are theletters A. D. which are an abbreviation for Anno Domini or the Year ofour Lord and B.- C. which are an abbreviation of Before Christ. Belowthe same space are the letters O. S. which are an abbreviation for Oldstyle of reckoning and below these letters are the numerals 500 and1200. Below these last numerals are the letters Sat.

vwhich is an abbreviation of Saturday, and to the right of these lettersare the letters A. D. which is the abbreviation of Anno Domini. Theletters Sat. in this column show that the first day of the respectivecenturies fell on Saturday. In the neXt column to the left are thenumerals representing the 3rd, 7th, 11th, 15th, 19th, 23rd, 27th, 31st,35th, 39th, 43rd, and 47th centuries, and below are the abbreviationsfor Monday and Friday, which show that the rst day of each century A. D.was Monday, and the first day of each century B. C. was on Friday. Inthis column below Friday are the letters O. S. and the numerals 400 and1100, and below these numerals the abbreviation for Sunday, whichindicates that the first day of the 4th and 11th century C. S. wasSunday. In the next column to the left of the last column are theletters C. S. and the numerals for the 8rd, 10th and 17 th centuries,and below the abbreviation for Monday, which indicates that the firstday of these centuries was on Monday. In the next column to the left arethe numerals representing the 2nd, 6th, 10th, 14th, 18th, 22nd, 26th,30th, 34th, 38th, 42nd, and 46th centuries, above are the letters N. S.and below the abbreviation for Wednesday, which shows that under the newreckoning the first day of the centuries represented in this column,both A. D. and B. C. is Wednesday. Below in this column are letters C.S. for old style and numerals representing the 2nd, 9th, and 16thcenturies, and below these numerals the abbreviation for Tuesday showingthat the first day of these last centuries A. D. was on Tuesday. In thenext column to the left are the letters-O. S. and the numerals for the1st, 8th, and 15th centuries, and below the abbreviation Ved. In theneXtcolumn to the left areV the letters N. S. and the numerals representingthe 1st, 5th, 9th, 13th, 17th, 21st, 26th, 29th, 33rd, 37th, 41st, and45th centuries, and below are abbreviations for Friday and Monday, thefirst being in the A. D. designationv and the second in the B..C.showing that the first day of these centuries was Friday in A. D. andMonday in B. C. time. In the same column are the letters O. S. andnumeral 1, and numerals representing the 7th and 14th centuries, andbelow the abbreviation for Thursday, which shows that under the oldstyle Thursday was the first day of the 7th and 14th centuries. In theneXt column to the left arethe letters O. S. and the numeralsrepresenting the 6th and 13th centuries, and the abbreviations forFriday, showing that the first day of these last centuries A. D. was onFriday.

"When the central disk is turned to the position shown in the drawings,the vertical diameter will pass through Thursday A. D. and throughTuesday B. C. Commencing with Monday of that week and ending with Sundayof the following week I arrange upon the base or back radialyear-columns H, whose side lines I terminate at the radial lines C.VThese columns are divided by subradial lines J and by 9 circular crosslines K,

' thereby dividing each column into 2O spaces.

The outer four spaces are for B. C. leap year designations. In theradial column registering with Monday on the right are the figures 1, 7,18, 29, 35, 46, 57, and 63, 24, 52, 74, 80, 85, and 91, 12, 40, 68, and96. In the column registering with Tuesday are the figures 2, 13, 19,30, 41, 47, and 5s, s, 36, 64, 69, 75, 36, and 97, 24, 52, 92 and 80. Inthe column registering with ednesday are figures 3, 14, 25, 31, 42, 53,and 69, 20, 48, 70, 76, 81, 87, and 98, 8, 36, 64, and 92. In the columnregistering with Thursday are figures 9, 15,

26, 37, 43, 54, and 65, 4, 32, 60, 71, 32, 63, 93,

and 99, 20 and 48. In the column registering with Friday are the figures10, 21, 27, 38, 49, 5,5, and 66, 16, 44, 72, 77, 83, and 94, 4, 32, 60,and 88. In the column registering with Saturday are the figures 5, 11,22, 33, 39, 50 and 61, 28, 56, 67, 73, s4, 39, `and 95, 16, 44 and 72.In the column registering with Sunday are the figures 6, 17, 23, 34, 45,51, and 62, 12, 40, 68, 73, 79, 96 and 90, 28, 56, 84. Below the radialyear columns at the left of the disk I arrange 7 radial ordinary monthcolumns L, the side lines of which register with the radial lines of thedisk. The column registering with Monday contains October and January,that registering with Tuesday contains May, that registering withVednesday contains August, that registering with Thursday containsFebruary, Yl/Iarch and November, that registering with Friday containsJune, that registering with Saturday contains September and December,that registering with Sunday cont-ains July and April.

Below the radial year-columns on the right of the disk I arrange 7leap-year monthcolumns M, That leap-year month column registering withSunday contains September and December, with Saturday June, with FridayMarch and November, with Thursday February and August, with WednesdayMay, Ywith Tuesday October, lwith Monday January, April and July. Q

At the bottom of the disk and between the month-columns are 7 radialday-columns N. The column registering with h/Ionday contains thenumerals 1, 8, 15, 22, and 29, with Tuesday 2, 9, 16, 23, and 30, withWednesday 3, 10, 17, 24, 31, with Thursday 4, 11, 18, and 25, withFriday 5, 12, 19, and 26, withSaturday 6, 13, 20, 27, with Sunday 7, 14,21, and 28.

In the center of the disk is a thumb piece O which is firmly secured tothe disk. A shaft P is secured to this thumb piece and-to the disk.Below the disk and mounted on this shaft is a pointer R which isrevoluble thereon, and projects beyond the disk. Shaft P passes throughback A and has on the outer end thereof a washer S which prevents theparts from separating and allows the shaft to rotate in the back.Pointer R is turned to that month of the current year which is passingand the disk is rotated to bring the day of the week which is or was thefirst day of the month into register with the day column containing thenumeral 1. If the year is not a leap year, the pointer would be at theordinary month side, but if the year were a .leap year the pointer wouldbe on the leap year month side. vThis construction allows of the use ofthe-calendar as an ordinary calendar. For finding the day of the week ofany date it is used as follows; for illustration suppose that it isdesired to know what day of the week June 10th, 1906, was. We then lookin the century column on the disk for the century 1900, and we bringthat column into register with the year column at t-he extreme right. 7ethen look in the year columns at the top for the year 6, whiehin thisoase we find to be in the left hand column which registers with the weekday Monday which shows that the first day of January, 1906 was Monday.As 1906 is a. common year we turn the disk so that Monday registers withJanuary on the left. We then look for June at'the left and find that thefirst day of vJ une is Friday. We then turn the disk to Having describedmy invention What I claim isl. A perpetual calendar comprising a base onwhich is printed tabulated information arranged in columns, the bases ofwhich columns form a circle, in combination With Y tabulated informationarranged in radial columns around seven parallel columns and printedupon a revolving circular disk secured to the base, said circular diskbeing arranged Within the circle of the base columns and said sevenparallel columns being adapted to register With seven radial columns onthe base.

2. A perpetual calendar comprising a base on which is printed intabulated columns, at the top numerals representing the years from l to99, common month columns at the left side and leap year month columns atthe right side, and day columns at the bottom, said columns being soarranged that their bases form a circle, a revolving circular disksecured to said base Within said columns, said disk having printedthereon at the circumference thereof Week day designations arranged toread from right to left, and around half the circle and Within the outerWeek day designations, other Week day designations arranged to read fromleft to right, and also having seven century columns in the centerthereof, said century columns registering with the right hand seven Weekday designations of the semi-circle.

3. A perpetual calendar comprising a base on Which is printed tabulatedinformation arranged in columns the bases of which form a circle, saidinformation comprising seven year columns at the top, seven ordinarymonth columns at the left, seven leap year month columns at the right,and seven day columns at the bottom, in combination with tabulatedinformation printed upon a revolving circular disk secured to the base,

Within the columns of the base, said tabu-- lated information comprisingWeek day designations reading from right to left around the entirecircumference of the disk, each Week day registering With a column onthe base, Week day designations arranged around half the circumferenceof the disk and Within the outer designations and reading from left toright, and seven century columns in the center of the disk, each columnregistering with one of the seven Week day designations reading fromleft to right and being the seven on the right hand side of thesemicircle.

4. A perpetual calendar comprising a base on which is printed tabulatedinformation arranged in columns, the bases of which form a circle, saidtabulated information comprising seven year columns at the top, sevenordinary month columns at the left side, seven leap year columns at theright side, and seven day columns at the bottom thereof, in combinationWith a revolving circular disk secured to the base having Week daydesignations printed thereon near the circumference thereof and apointer revolubly mounted in the base and having the point thereofprojecting beyond the disk.

In Witness that I claim the foregoing I have hereunto subscribed my namethis 19th day of June, 1909.

SILAS L. BERRY. litnesses F. E. MONTEVERDE, S. B. AUSTIN.

